Two surveys of thousands and thousands of stars in our galaxy have revealed mysterious spikes in infrared warmth coming from dozens of them. Astronomers say this could possibly be proof for alien civilisations harnessing power from their stars by utilizing an unlimited development often known as a Dyson sphere – though they will’t absolutely rule out extra mundane explanations.

First proposed within the Sixties, Dyson spheres are hypothesised constructions that might encompass whole stars to soak up their power, a…